A load of 80N is lifted with the help of 100N effort using a single fixed pulley. Calculate the following :) i. घिनी को एमए (MA of the pulley) कार्यक्षमता (Efficiency) il. भार उठाउँदा कति प्रतिशत ऊर्जा खर्च हुन्छ ? (How much percentage of the energy is wasted while lifting the load?) [Ans: MA = 0.8, 80%, 20%]

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